A British businessman and outspoken critic of Vladimir Putin said his ability to enter the US has been revoked after Russia placed him on an international police wanted list. Bill Browder, a hedge fund manager and activist, said he was informed his so-called Global Entry status had been suspended and that he was unable to check in for a flight to the US, after Russia had him added to the Interpol arrest list. Mr Browder, 53, who pushed for the US to enforce a powerful set of sanctions against figures close to the Kremlin, said Russia had tried on four previous occasions to have him placed on the Interpol Red List.

Billionaire Saudi Prince Alwaleed bin Talal, who owns investment firm Kingdom Holding, expressed skepticism about cryptocurrencies in an interview with CNBC on Monday, warning that bitcoin was like “Enron in the making”. Prince Alwaleed, whose company invests in major U.S. companies such as Citigroup and Twitter, said a lack of regulation made such cryptocurrencies risky. It’s Enron in the making,” he said, referring to the U.S. energy company that filed for bankruptcy in 2001 after revelations of a widespread accounting fraud.

Simmering tension between Senate Armed Services Committee Chairman John McCain and the Trump administration’s national security team over information sharing, the defense budget and Pentagon appointments boiled into public view last week.